作为钻井液添加剂的以埃普森盐为基础的天然深层欧性溶剂:在页岩胀抑制方面改变了游戏规则
Muhammad Hammad Rasool1, Maqsood Ahmad1
1Department of Petroleum Geosciences, Universiti Teknologi Petronas, Seri Iskander 31750, Malaysia.
Molecules (Basel, Switzerland)
|August 12, 2023
概括
天然深层维生素溶剂 (NADES) 有效地抑制钻井液中的页岩膨胀. 这种非有毒,低成本的替代品离子液体 (ILs) 和深深的溶解剂 (DESs) 改善了泥的特性,并减少了井口的不稳定性.
科学领域:
- 钻井工程 钻井工程
- 材料科学 材料科学 材料科学
- 地质化学 地质化学
背景情况:
- 在钻井过程中页岩膨胀会导致井口不稳定,需要有效的页岩抑制剂.
- 传统的抑制剂,如离子液体 (ILs),面临挑战,包括毒性,生物降解性和成本.
- 深度欧特基溶剂 (DES) 提供了一个替代方案,但基于盐的DES并不完全环保.
研究的目的:
- 为了研究天然深层乳化溶剂 (NADES) 作为水性钻井液中的页岩抑制剂的有效性.
- 为了评估来自Epsom盐和甘油的NADES的性能.
- 为了比较NADES的性能与传统的抑制剂,如KCl和EMIM-Cl.
主要方法:
- 根据API 13B-1标准的钻井泥制备,具有不同的NADES度.
- 在老化和未老化的泥样本上进行了风湿性质测试 (产量点,塑料粘度) 和过试验.
- 使用线性膨胀计测量膨胀抑制;通过FTIR,XRD,表面张力和泽塔电位分析进行表征.
主要成果:
- 在1%度下,NADES提高了产量点和塑料粘度,在1%度下降了26%的泥饼厚度和30.1%的过体积.
- 最佳的NADES度 (1%) 达到49.14%的页岩膨胀抑制.
- 通过FTIR,XRD,表面张力和泽塔电位阐明的机制表明NADES改变了粘土表面的活动和结构.
结论:
- 基于埃普森盐和甘油的NADES是一种高效,无毒,经济高效的页岩抑制剂.
- 与KCl和EMIM-Cl相比,NADES在减轻页岩膨胀方面表现优越.
- 在钻井流体应用中,NADES为传统IL和DES提供了一个可持续和可行的替代方案.
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